Mighty Sail, Silly Wind

A sail was put up on a newly built ship.
After being at the sea for a fortnight thought it was mighty.
And began feeling it could attract the wind by its strength. It started moving by its own fancy leaving the sailor bemused.
One day the wind changed direction and leaving the mighty sail empty to enjoy its fantasies. The ship was left stranded facing the waves, the sailor thought all's over.

also read:
1) The man who never went to the sea
2) Are you seriously sincere?